Scenic only generates one scene per call

[Kai-X-Org]

System Details

1. Python 3.11.0
2. Scenic 3.0.0b2
3. Apple M1 Pro MacOS Ventura 13.4
4. No simulator

Detailed Description

When running a scenic file from the command line without setting the --count flag, Scenic only generates one scene. After closing the window popped up by clicking the red x, Scenic terminates rather than generate another scene.

Steps To Reproduce

I simply ran ego = new Object in a Scenic file from the command line.

Issue Submission Checklist

• I am reporting an issue, not asking a question
• I checked the open issues, forum, etc. and have not found any solution
• I have provided all necessary code, etc. to reproduce the issue

[ek65]

Hi, @Kai-X-Org, I could not replicate your error on my end.
Could you try running a scenic program in examples/webots/vacuum/vacuum_simple.scenic and see if you run into the same issue?

[abanuelo]

@Eric-Vin @Kai-X-Org I have confirmed that this error exists. Namely, when you try to close out the pygame display it only generates a single simulation and when you try to close it out, it prevents you from doing so.

My script:

model scenic.simulators.newtonian.model
ego = new Object

My command:

scenic examples/carla/test.scenic \
    --2d       \
    --simulate \
    --model scenic.simulators.newtonian.model -b

Here is a video illustrating the process. Note, the only way to quit the simulation is to have a KeyboardInterrupt which is not ideal because it does not allow for subsequent simulations to continue.

pygame_error.mov

[abanuelo]

@Kai-X-Org following up on the issue, here I was able to reproduce the issue without a simulator. Also note the fix #238 above actually allows us to terminate dynamic scenarios mid-scenario so it's actually a feature and not related to the issue you indicated in this PR:

Here is the current behavior:

actual.mov

Here is the expected behavior

expected.mov

[abanuelo]

Note, I think this may be the intended behavior for the Cocoa implementation that is used in MacOS environments by pyglet. More details can be reported in this open issue: mikedh/trimesh#2131